Chinese D-Series Paper Size Lookup

Chinese D-Series Paper Size Lookup: Core Features and Principles

Are you tired of constantly searching for or making mistakes with exact Chinese standard paper sizes during design and printing? This tool provides a lookup chart for D-series paper sizes defined by the Chinese national standard GB/T 19999-2003. The D-series is a paper specification system unique to China. Starting with D0 (full sheet) as the base size, it is folded in half sequentially to produce the D1 (folio), D2 (quarto/4mo), D3 (octavo/8mo) series, and so on. Its dimensional relationships are based on the modular requirements of printing and binding, rather than the internationally common √2 ratio. This tool directly outputs the exact millimeter (width × height) values for each specification from D0 to D6, helping you quickly obtain standard data for typesetting, design, printing, and purchasing.

Why Choose Our Chinese D-Series Paper Size Lookup?

• Authoritative Data: Strictly based on the current national standard GB/T 19999-2003 "Sizes and formats of books and magazines," ensuring the accuracy and compliance of the dimension data.
• Intuitive Lookup: No input required. It directly provides a clear millimeter size chart for the complete D0 to D6 series (e.g., full sheet, folio, 4mo, 8mo, 16mo, 32mo, 64mo) at a glance.
• Focused Application: Specifically tailored for Chinese publishing, printing, office, and design scenarios, providing standard sizes that differ from the ISO international A-series and better meet actual domestic needs.

Tool Tutorial

1. Open the tool page and locate the "Chinese Standard D-Series Paper Size Chart."
2. In the "Paper Specification" column of the table, find the D-series specification name you need to look up (e.g., "D4 (16mo)").
3. Check the "Millimeters (Width × Height)" column to its right to get the corresponding exact size (e.g., 188×260 mm).

Frequently Asked Questions (FAQ)

• Q: What is the size of D4 paper?
  A: The standard size of D4 (16mo) is 188 mm wide and 260 mm high (188×260 mm).
• Q: What is the main difference between the Chinese GB D-series and the international A-series (like A4)?
  A: They originate from different standard systems. There are three core differences: First, the base sizes are different (D0 is 764×1064 mm, while A0 is 841×1189 mm). Second, the aspect ratios are different (the D-series is based on printing modules, while the A-series is based on the √2 ratio). Third, the application regions differ (the D-series is mainly used for Chinese books, textbooks, and some office paper, whereas the A-series is an international standard).

Notes

This tool provides the finished (net) sizes specified by the national standard. During actual printing and production, be sure to include a bleed margin (usually 3 mm on each side) as required by the printing plant. The table data applies to standard situations. For special binding methods (such as saddle stitching or perfect binding) or specialty papers, it is recommended to confirm the final trim size with your printing service provider. The data references GB/T 19999-2003; if industry standards are updated, please refer to the latest official documents.

Technical Notes & Usage Tips

When designing book covers or brochures, in addition to looking up the D-series size for the inner pages, note that the cover size is usually slightly larger than the inner pages (known as the "overhang" or "lip"). For example, the cover size of a 16mo (D4) book typically needs an additional 1-3 mm on each side beyond the 188×260 mm base. Furthermore, D-series sizes represent the "book format" (mo) concept, which directly corresponds to the "full sheet" and "folio" specifications of printing presses. Understanding this helps achieve the most economical paper utilization during imposition. Typical input/output example: Look up "D3 (8mo)", and the output is "380×528 mm".